13991953 has 2 divisors, whose sum is σ = 13991954. Its totient is φ = 13991952.

The previous prime is 13991933. The next prime is 13991977. The reversal of 13991953 is 35919931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13483584 + 508369 = 3672^2 + 713^2 .

It is an emirp because it is prime and its reverse (35919931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13991953 - 2⁹ = 13991441 is a prime.

It is not a weakly prime, because it can be changed into another prime (13991933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6995976 + 6995977.

It is an arithmetic number, because the mean of its divisors is an integer number (6995977).

Almost surely, 2^13991953 is an apocalyptic number.

It is an amenable number.

13991953 is a deficient number, since it is larger than the sum of its proper divisors (1).

13991953 is an equidigital number, since it uses as much as digits as its factorization.

13991953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32805, while the sum is 40.

The square root of 13991953 is about 3740.5819066022. The cubic root of 13991953 is about 240.9680403893.

The spelling of 13991953 in words is "thirteen million, nine hundred ninety-one thousand, nine hundred fifty-three".